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runtime: add type algorithms for zero-sized types

Browse source 
BenchmarkChanSem old=127ns new=78.6ns

R=golang-dev, bradfitz, sameer, rsc
CC=golang-dev
https://golang.org/cl/5558049
This commit is contained in:
Dmitriy Vyukov 2012-01-20 10:32:55 +04:00
parent 43b4db194a
commit 1ff1405cc7
5 changed files with 34 additions and 0 deletions
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19
src/pkg/runtime/alg.c
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@ -88,6 +88,23 @@ runtime·memcopy(uintptr s, void *a, void *b)
runtime·memmove(a, b, s);
}
void
runtime·memequal0(bool *eq, uintptr s, void *a, void *b)
{
USED(s);
USED(a);
USED(b);
*eq = true;
}
void
runtime·memcopy0(uintptr s, void *a, void *b)
{
USED(s);
USED(a);
USED(b);
}
void
runtime·memequal8(bool *eq, uintptr s, void *a, void *b)
{
@ -332,11 +349,13 @@ runtime·algarray[] =
[AINTER] { runtime·interhash, runtime·interequal, runtime·interprint, runtime·intercopy },
[ANILINTER] { runtime·nilinterhash, runtime·nilinterequal, runtime·nilinterprint, runtime·nilintercopy },
[ASLICE] { runtime·nohash, runtime·noequal, runtime·memprint, runtime·slicecopy },
[AMEM0] { runtime·memhash, runtime·memequal0, runtime·memprint, runtime·memcopy0 },
[AMEM8] { runtime·memhash, runtime·memequal8, runtime·memprint, runtime·memcopy8 },
[AMEM16] { runtime·memhash, runtime·memequal16, runtime·memprint, runtime·memcopy16 },
[AMEM32] { runtime·memhash, runtime·memequal32, runtime·memprint, runtime·memcopy32 },
[AMEM64] { runtime·memhash, runtime·memequal64, runtime·memprint, runtime·memcopy64 },
[AMEM128] { runtime·memhash, runtime·memequal128, runtime·memprint, runtime·memcopy128 },
[ANOEQ0] { runtime·nohash, runtime·noequal, runtime·memprint, runtime·memcopy0 },
[ANOEQ8] { runtime·nohash, runtime·noequal, runtime·memprint, runtime·memcopy8 },
[ANOEQ16] { runtime·nohash, runtime·noequal, runtime·memprint, runtime·memcopy16 },
[ANOEQ32] { runtime·nohash, runtime·noequal, runtime·memprint, runtime·memcopy32 },